12
WORKSHOP MANUAL
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Piston must have signing L (left side)
or P (right side) for the corresponding cylinder
and the arrow must be oriented forward to the
exhaust ports. Use the press-out pin S-87 to
push the piston pins. Make sure, that the
lightening holes of the piston pins are oriented
to the engine outside. Lock the piston pins
with lock rings. When mounting new pistons,
check if their identification marks (i.e. A,B,C)
correspond to each cylinder.
Make this check before mounting the
piston rings to be sure that the piston in the
cylinder is not off the axis: fit the piston
(without rings) provisionally on the piston and
turn the crank mechanism with the starting
lever to see if the piston have the identical
clearance on each side when it is in the top
dead end position.
If it leans permanently against one side and,
when pushed off, returns to the original position,
take the cylinder out and bend with caution the
connecting rod with piston to the other side. This
act is called „connecting rod angle adjusting“.
The truly adjusted connecting rod must have the
identical play on each side.